How common are STIs?

Nov 02, 2021 Updated: Aug 28, 2025

Super common. 1 in 2 people will get a sexually transmitted infection (STI) by the time they reach the age of 25.
There are a few things you can do to protect yourself from STIs. First, get vaccinated for HPV and Hepatitis B, use condoms or internal condoms when you have sex, get tested regularly, use PrEP (and PEP) and talk openly about sexual health with your partner(s).

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safety condom sexual health & wellness how-to internal condom sexually transmitted infections (STIs/STDs)
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Bedsider and Sexually Transmitted Infections (STDs, STIs)

STIs can often be prevented—and if they do happen, there are clear steps you can take. Bedsider covers testing, treatment, prevention, and partner communication with medically reviewed content grounded in the latest guidelines from leading medical authorities and vetted by sexual health clinicians.

Related methods

Dive in and learn all the details about these related birth control methods.

birth control
Condom
Very effective if you use them correctly, but not super effective the way most people use them. Hormone free, protect against STIs, and don't require a prescription, but they do require work.
birth control
Internal condom (FC2)
Very effective if you use them correctly, but not super effective the way most people use them. Hormone free, protect against STIs, and great for those with latex allergies.